{4/5 chia 6/5 + 1/5 chia 1/2] nhân 30 - 26 =54
(4/5 : 6/5 + 1/5 : 1/x) * 30 - 26 = 54
\(\Leftrightarrow\)\(\left(\frac{2}{3}+\frac{x}{5}\right)\)\(\times30-26=54\)
\(\Leftrightarrow20+6x\)\(-26=54\)
\(\Leftrightarrow6x=54+26-20\)
\(\Leftrightarrow6x=60\)
\(\Leftrightarrow x=10\)
Học tốt!
\(\left(\frac{4}{5}:\frac{6}{5}+\frac{1}{5}:\frac{1}{x}\right)\cdot30-26=54\)
\(\left(\frac{4}{5}\cdot\frac{5}{6}+\frac{1}{5}\cdot x\right)\cdot30=54+26\)
\(\left(\frac{2}{3}+\frac{x}{5}\right)\cdot30=80\)
\(\frac{2}{3}+\frac{x}{5}=80:30\)
\(\frac{2}{3}+\frac{x}{5}=\frac{8}{3}\)
\(\frac{x}{5}=\frac{8}{3}-\frac{2}{3}\)
\(\frac{x}{5}=2\)
\(x=10\)
\(x=10\)\(nha\)
\(HOK\)\(T~\)
(4/5 : 6/5 + 1/5 :1/x) X 30 - 26= 54
Tìm x
( 4/5 : 6/5 + 1/5 : 1/x ) x 30 -26 = 54
\(\left(\dfrac{4}{5}:\dfrac{6}{5}+\dfrac{1}{5}:\dfrac{1}{x}\right)\times30-26=54\)
\(\left(\dfrac{4}{5}\times\dfrac{5}{6}+\dfrac{1}{5}\times x\right)\times30=54+26\)
\(\left(\dfrac{4}{6}+\dfrac{1}{5}\times x\right)\times30=80\)
\(\dfrac{4}{6}+\dfrac{1}{5}\times x=\dfrac{8}{3}\)
\(\dfrac{1}{5}\times x=\dfrac{8}{3}-\dfrac{4}{6}\)
\(\dfrac{1}{5}\times x=2\)
\(x=2:\dfrac{1}{5}\)
\(x=2\times5\)
\(x=10\)
Tìm x
( 4/5 : 6/5 + 1/5 : 1/x ) x 30 = 26 = 54
`( 4/5 : 6/5 + 1/5 : 1/x ) xx 30 = 26 = 54`
Hai dấu `=` là sao nhỉ ?
1.tìm x
(4/5:6/5+1/5:1/y)*30-26=54
a) ( 1+3+5+7+...999) (1 nhân 65 nhân 101 nhân 37)
b) 2+4+6+...2014
c) 15791579 nhân 2005 + 20142015 - 20052005
d) 75 nhân 5 mũ 4 + 175 nhân 5 mũ 4 chia 20 nhân 25 nhân 125 - 625 nhân 75
e) 1234 nhân 99....9 ( ở chỗ chấm có 50 chữ số 9)
f) 11.......1 ( ỡ chỗ chấm có 100 chữ số 1)
g) 333...3 ( ở chỗ chấm có 50 chữ số 3)
h ) 1+4+5+9+...+97
2. tìm x € N , biết :
a) x+5 nhân 2 - (32+12nhaann 3 chia 6 - 15 ) = 0
b) x - 6 chia 2 - ( 48-24) chia 2 chia 6 - 3 = 0
c) [(46-32)mũ 2 - ( 54-42)mũ 2] 2x - 1872 =0
Tìm x
(4/6 : 6/5 + 1/5 : 1/X) x 30 - 26 = 54
y + y x y x 1/3 : 2/9 + y : 2/7 = 252
(4/5 : 6/5 + 1/5 : 1/y) x 30 - 26 += 54
(4/5 : 6/5 + 1/5 : 1/x) * 30 - 26 = 54
ai đó biết làm ơn chỉ mình cái đang vội
\(\left(\frac{4}{5}:\frac{6}{5}+\frac{1}{5}:\frac{1}{x}\right)\cdot30-26=54\)
\(\left(\frac{2}{3}+\frac{x}{5}\right)\cdot30=54\cdot26\)
\(\left(\frac{2}{3}+\frac{x}{5}\right)\cdot30=1404\)
\(\frac{2}{3}+\frac{x}{5}=1404:30\)
\(\frac{2}{3}+\frac{x}{5}=\frac{234}{5}\)
\(\frac{x}{5}=\frac{234}{5}-\frac{2}{3}\)
\(\frac{x}{5}=\frac{692}{15}\)
\(x=\frac{692}{15}\cdot5\)
\(x=\frac{692}{3}\)
\(\left(\frac{4}{5}:\frac{6}{5}+\frac{1}{5}:\frac{1}{x}\right)\times30-26=54\)
\(\Leftrightarrow\left(\frac{4}{5}\times\frac{5}{6}+\frac{1}{5}\times x\right)\times30=80\)
\(\Leftrightarrow\frac{2}{3}+\frac{1}{5}\times x=\frac{8}{3}\)
\(\Leftrightarrow\frac{1}{5}\times x=2\)
\(\Leftrightarrow x=2:\frac{1}{5}\)
\(\Leftrightarrow x=2\times5\)
\(\Leftrightarrow x=10\)
Vậy x = 10.
Matcha
\(\left(\frac{4}{5}\div\frac{6}{5}+\frac{1}{5}\div\frac{1}{x}\right)\times30-26=54\)
\(\Leftrightarrow\left(\frac{4}{5}\times\frac{5}{6}+\frac{1}{5}\times\frac{x}{1}\right)\times30=80\)
\(\Leftrightarrow\frac{2}{3}+\frac{x}{5}=\frac{8}{3}\)
\(\Leftrightarrow\frac{x}{5}=2\)
\(\Leftrightarrow x=10\)
Vậy\(x=10\)